I just upgraded my RH 7.3 (2.4.18) host to 2.4.19. During the
configuration process, I noticed that I could configure the kernel to
use my USB audio speakers (Microsoft Digital Sound System 80).

I built the kernel and rebooted. While the host was in POST, I plugged
in the USB cable. The following was in /var/log/messages, so I thought
I'd send it to you.

Oct 16 21:19:52 fs kernel: usb.c: registered new driver hub
Oct 16 21:19:52 fs kernel: uhci.c: USB Universal Host Controller Interface driver v1.1
Oct 16 21:19:52 fs kernel: PCI: Found IRQ 4 for device 00:04.2
Oct 16 21:19:52 fs kernel: uhci.c: USB UHCI at I/O 0xd400, IRQ 4
Oct 16 21:19:52 fs kernel: usb.c: new USB bus registered, assigned bus number 1
Oct 16 21:19:52 fs kernel: hub.c: USB hub found
Oct 16 21:19:52 fs kernel: hub.c: 2 ports detected
Oct 16 21:19:52 fs kernel: usb.c: registered new driver audio
Oct 16 21:19:52 fs kernel: audio.c: v1.0.0:USB Audio Class driver
Oct 16 21:19:52 fs kernel: hub.c: USB new device connect on bus1/1, assigned device 
number 2
Oct 16 21:19:52 fs kernel: usbaudio: device 2 audiocontrol interface 0 has 0 input and 
1 output AudioStreaming interfaces
Oct 16 21:19:52 fs kernel: usbaudio: device 2 interface 1 altsetting 0 does not have 
an endpoint
Oct 16 21:19:53 fs kernel: usbaudio: valid output sample rate 4990
Oct 16 21:19:53 fs kernel: usbaudio: valid output sample rate 55010
Oct 16 21:19:53 fs kernel: usbaudio: device 2 interface 1 altsetting 1: format 
0x00000040 sratelo 4990 sratehi 55010 attributes 0x01
Oct 16 21:19:53 fs kernel: usbaudio: valid output sample rate 4990
Oct 16 21:19:53 fs kernel: usbaudio: valid output sample rate 55010
Oct 16 21:19:53 fs kernel: usbaudio: device 2 interface 1 altsetting 2: format 
0x80000040 sratelo 4990 sratehi 55010 attributes 0x01
Oct 16 21:19:53 fs kernel: usbaudio: valid output sample rate 4990
Oct 16 21:19:53 fs kernel: usbaudio: valid output sample rate 55010
Oct 16 21:19:53 fs kernel: usbaudio: device 2 interface 1 altsetting 3: format 
0x00000010 sratelo 4990 sratehi 55010 attributes 0x01
Oct 16 21:19:53 fs kernel: usbaudio: valid output sample rate 4990
Oct 16 21:19:53 fs kernel: usbaudio: valid output sample rate 55010
Oct 16 21:19:53 fs kernel: usbaudio: device 2 interface 1 altsetting 4: format 
0x80000010 sratelo 4990 sratehi 55010 attributes 0x01
Oct 16 21:19:53 fs kernel: usbaudio: device 2 interface 1 altsetting 5 unsupported 
channels 1 framesize 3
Oct 16 21:19:53 fs kernel: usbaudio: device 2 interface 1 altsetting 6 unsupported 
channels 2 framesize 3
Oct 16 21:19:53 fs kernel: usbaudio: registered dsp 14,3
Oct 16 21:19:53 fs kernel: usbaudio: registered mixer 14,0
Oct 16 21:19:53 fs kernel: usbaudio: warning: found 2 of 1 logical channels.
Oct 16 21:19:53 fs kernel: usbaudio: no idea what's going on..., contact 
[EMAIL PROTECTED]
Oct 16 21:19:53 fs kernel: usbaudio: mixer request device 2 if 0 unit 11 ch 1 selector 
2 failed
Oct 16 21:19:53 fs kernel: usbaudio: registered mixer 14,16
Oct 16 21:19:53 fs kernel: hub.c: USB new device connect on bus1/2, assigned device 
number 3
Oct 16 21:19:53 fs kernel: hub.c: USB hub found
Oct 16 21:19:53 fs kernel: hub.c: 4 ports detected
Oct 16 21:23:59 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/usr/bin/aumix
Oct 16 21:24:10 fs kernel: usbaudio: mixer request device 2 if 0 unit 6 ch 0 selector 
2 failed
Oct 16 21:24:14 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/usr/bin/aumix
Oct 16 21:24:18 fs kernel: usbaudio: mixer request device 2 if 0 unit 6 ch 0 selector 
2 failed
Oct 16 21:24:19 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/usr/bin/aumix
Oct 16 21:24:23 fs kernel: usbaudio: mixer request device 2 if 0 unit 6 ch 0 selector 
2 failed
Oct 16 21:24:25 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/usr/bin/aumix
Oct 16 21:24:26 fs kernel: usbaudio: mixer request device 2 if 0 unit 6 ch 0 selector 
2 failed
Oct 16 21:24:28 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/usr/bin/aumix
Oct 16 21:24:33 fs kernel: usbaudio: mixer request device 2 if 0 unit 6 ch 0 selector 
2 failed
Oct 16 21:24:43 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/bin/aumix-minimal
Oct 16 21:25:02 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/bin/aumix-minimal -q
Oct 16 21:25:10 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/bin/aumix-minimal -l 50
Oct 16 21:25:10 fs kernel: usbaudio: mixer request device 2 if 0 unit 6 ch 0 selector 
2 failed
Oct 16 21:25:14 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/bin/aumix-minimal -q
Oct 16 21:25:18 fs sudo: sedwards : TTY=pts/0 ; PWD=/home/sedwards ; USER=root ; 
COMMAND=/usr/bin/mpg123 /music/music/Everclear/Good Time For A Bad Attitude/01.When It 
All Goes Wrong Again.mp3

Here I unplugged the USB cable from the speakers

Oct 16 21:29:47 fs kernel: usb.c: USB disconnect on device 2
Oct 16 21:29:47 fs kernel: usbaudio: unregister dsp 14,3
Oct 16 21:29:47 fs kernel: usbaudio: unregister mixer 14,0
Oct 16 21:29:47 fs kernel: usbaudio: unregister mixer 14,16

Thanks in advance,
------------------------------------------------------------------------
Steve Edwards      [EMAIL PROTECTED]      Voice: +1-760-468-3867 PST
Newline           [EMAIL PROTECTED]            Fax: +1-760-731-3000



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